Results 21 to 30 of about 3,135 (181)

Clinical Images: Skeletal fluorosis presenting with diffuse periostitis and polyarticular synovitis. [PDF]

open access: yesArthritis Rheumatol
Arthritis &Rheumatology, Volume 78, Issue 9, Page 2001-2001, September 2026.
Sen M.
europepmc   +2 more sources

Effect of Different Additives on Reaction Characteristics of Fluorapatite During Coal-Based Reduction of Iron Ore

open access: yesMetals, 2019
In the coal-based reduction of high phosphorus oolitic hematite, it is particularly important to study the mechanism of phosphorus regulation during the formation of iron metals for the efficient development and utilization of iron ore.
Yongsheng Sun   +3 more
doaj   +1 more source

Effects of fluoride on in vitro hydroxyapatite demineralisation analysed by 19F MAS-NMR

open access: yesFrontiers in Dental Medicine, 2023
IntroductionFluoride plays a major role in inhibiting enamel dissolution and promoting fluorapatite formation. Porous hydroxyapatite (HAP) discs can be used as an enamel analogue in artificial demineralisation/remineralisation studies.MethodThe aim of ...
Bajram Ferizoli   +4 more
doaj   +1 more source

Native Cd+ in sedimentary fluorapatite

open access: yesEuropean Journal of Mineralogy, 2002
A native Cd+ centre (5s1, S = 1/2) was detected in natural sedimentary fluorapatite using Electron Paramagnetic Resonance (EPR). The Cd+ centre generated by artificial X-ray irradiation of the same sample has an EPR spectrum similar to the native Cd+ centre but differs in its thermal stability. The artificial Cd+ centre exhibits fast thermal decay, i.e.
Morin, Guillaume   +4 more
openaire   +1 more source

Research on Reaction Mechanism of Vacuum Carbon Thermal Reduction and Dephosphorization in High Phosphate Iron Ore

open access: yesMetals, 2018
According to the mineral composition characteristics of high-phosphorus iron ore, the reaction mechanism of fluorapatite was investigated using pure substance and gangue under vacuum carbon thermal reduction (VCTR) conditions.
Jun Zhao   +4 more
doaj   +1 more source

An NMR Study of Biomimetic Fluorapatite – Gelatine Mesocrystals [PDF]

open access: yesScientific Reports, 2015
AbstractThe mesocrystal system fluoroapatite—gelatine grown by double-diffusion is characterized by hierarchical composite structure on a mesoscale. In the present work we apply solid state NMR to characterize its structure on the molecular level and provide a link between the structural organisation on the mesoscale and atomistic computer simulations.
Vyalikh, Anastasia   +5 more
openaire   +4 more sources

Physicochemical and Antibacterial Characterization of a Novel Fluorapatite Coating [PDF]

open access: yesACS Omega, 2016
Peri-implantitis remains the major impediment to the long-term use of dental implants. With increasing concern over the growth in antibiotic resistance, there is considerable interest in the preparation of antimicrobial dental implant coatings that also induce osseointegration. One such potential coating material is fluorapatite (FA).
Alhilou, A   +5 more
openaire   +6 more sources

INVESTIGATION OF RHEOLOGICAL PROPERTIES OF HYDROXYAPATITE AND FLUORAPATITE IN COLLOIDAL STATE

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2020
The article discusses the possibility of practical application of a suspension of hydroxyapatite and fluorapatite as components of medicines, pharmaceutical compositions, and biomaterials.
E.A. Bogdanova, V.М. Skachkov
doaj   +1 more source

Geochemistry of Uranium and Rare Earth Elements in the Phosphate Horizon of Jeiroud Formation, Firoozkuh area, Central Alborz Zone [PDF]

open access: yesمجله علوم و فنون هسته‌ای
Two phosphorite deposits including Paghela and Gadok, within the Jiroud Formation (Upper Devonian) in the northeast of Firoozkuh in the Central Alborz geotectonic zone have been studied.
Samaneh Ziapour, Khalegh Khoshnoodi
doaj   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

open access: yesGeological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid   +9 more
wiley   +1 more source

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